Issue 28580. Relax instantiate to bounds.

pkg/analyzer/lib/src/generated/error_verifier.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.src.generated.error_verifier;
 
 import 'dart:collection';
 import "dart:math" as math;
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 5247 matching lines @@
   }
 
   void _checkForNotInstantiatedBound(TypeAnnotation node) {
     if (!_options.strongMode || node == null) {
       return;
     }
 
     if (node is TypeName) {
       if (node.typeArguments == null) {
         DartType type = node.type;
-        if (type is ParameterizedType) {
-          Element element = type.element;
-          if (element is TypeParameterizedElement &&
-              element.typeParameters.any((p) => p.bound != null)) {
-            _errorReporter.reportErrorForNode(
-                StrongModeCode.NOT_INSTANTIATED_BOUND, node, [type]);
-          }
+        if (type is TypeImpl && type.hasTypeParameterReferenceInBound) {
+          _errorReporter.reportErrorForNode(
+              StrongModeCode.NOT_INSTANTIATED_BOUND, node, [type]);
         }
       } else {
         node.typeArguments.arguments.forEach(_checkForNotInstantiatedBound);
       }
     } else {
       throw new UnimplementedError('${node.runtimeType}');
     }
   }
 
   /**
@@ skipping 1809 matching lines @@
 class _InvocationCollector extends RecursiveAstVisitor {
   final List<String> superCalls = <String>[];
 
   @override
   visitMethodInvocation(MethodInvocation node) {
     if (node.target is SuperExpression) {
       superCalls.add(node.methodName.name);
     }
   }
 }